https://jira.opendaylight.org This file is an XML representation of an issue en-us 8.20.10 820010 22-06-2022 https://jira.opendaylight.org/browse/CONTROLLER-79 controller <p>I've made a simple test on mininet. And it showed that controller writes forwarding rules only for the first iteration of packet exchange.</p> <p>1)Start the controller on local ip(127.0.0.1:6633)<br/> 2)sudo mn --controller=remote,ip=127.0.0.1 --topo tree,3<br/> 3)login to controller ui via browser, and adding the ip getaway(10.0.0.254/24)</p> <p>Then perform command in mininet:<br/> 4)dpctl dump-flows<br/> It shows that all switch's flow-tables are empty. Then do</p> <p>5)pingall<br/> After that flow-tables are filled(may be checked via same dpctl)<br/> doing ping for any host pair(measure time approx (I had 0.1ms))<br/> 7)dpctl del-flows<br/> 8)try to ping again the same pair - ping goes well, but time increases a lot(I got about 3.7ms) - it means that all packages forwarded through the controller<br/> 9)check again flow-tables - no rules are written(so the controller knows how to forward those packages - but it doesn't write rules)</p> <p>Operating System: Linux<br/> Platform: PC</p> CONTROLLER-79

Writing forwarding rules only once

Bug Resolved Cannot Reproduce Venkata Siva Vijayendra Bhamidipati Fedor Goncharov Wed, 4 Dec 2013 07:44:01 +0000 Tue, 25 Jul 2023 08:22:53 +0000 Mon, 4 May 2015 23:54:45 +0000 adsal 0 3 <p>Fixed with<br/> <a href="https://git.opendaylight.org/gerrit/#/c/3487/" class="external-link" target="_blank" rel="nofollow noopener">https://git.opendaylight.org/gerrit/#/c/3487/</a></p> <p>Please discard previous comment</p> <p>Hi Fedor,</p> <p>This doesn't look like a bug to me. If your concern is that flows seem to disappear after a ping, it's because OVS times out flows after a set interval. So the flows do disappear in around 5 seconds after they are entered. I assume that mininet honors this behavior of OVS in its code as well (if I'm not wrong it uses ovs code itself).</p> <p>For example, to begin with, I have no flows:</p> <p>mininet&gt; dpctl dump-flows</p> <ul> <li> <ul> <li> <ul> <li>s1 ------------------------------------------------------------------------</li> <li>s2 ------------------------------------------------------------------------</li> <li>s3 ------------------------------------------------------------------------</li> <li>s4 ------------------------------------------------------------------------</li> <li>s5 ------------------------------------------------------------------------</li> <li>s6 ------------------------------------------------------------------------</li> <li>s7 ------------------------------------------------------------------------<br/> mininet&gt; </li> </ul> </li> </ul> </li> </ul> <p>Then, I ping h6 from h1, and then ctrl^c it, and <b>immediately</b> check the flows:</p> <p>mininet&gt; h1 ping h6<br/> PING 10.0.0.6 (10.0.0.6) 56(84) bytes of data.<br/> 64 bytes from 10.0.0.6: icmp_req=1 ttl=64 time=6.15 ms<br/> 64 bytes from 10.0.0.6: icmp_req=2 ttl=64 time=0.054 ms<br/> ^C<br/> &#8212; 10.0.0.6 ping statistics &#8212;<br/> 2 packets transmitted, 2 received, 0% packet loss, time 1001ms<br/> rtt min/avg/max/mdev = 0.054/3.105/6.156/3.051 ms<br/> mininet&gt; dpctl dump-flows</p> <ul> <li> <ul> <li> <ul> <li>s1 ------------------------------------------------------------------------<br/> in_port(1),eth(src=da:4b:88:0c:1b:56,dst=0a:0d:4c:0c:50:9f),eth_type(0x0800),ipv4(src=10.0.0.1,dst=10.0.0.6,proto=1,tos=0,ttl=64,frag=no),icmp(type=8,code=0), packets:1, bytes:98, used:1.156s, actions:2<br/> in_port(2),eth(src=0a:0d:4c:0c:50:9f,dst=da:4b:88:0c:1b:56),eth_type(0x0800),ipv4(src=10.0.0.6,dst=10.0.0.1,proto=1,tos=0,ttl=64,frag=no),icmp(type=0,code=0), packets:1, bytes:98, used:1.156s, actions:1</li> <li>s2 ------------------------------------------------------------------------<br/> in_port(1),eth(src=da:4b:88:0c:1b:56,dst=0a:0d:4c:0c:50:9f),eth_type(0x0800),ipv4(src=10.0.0.1,dst=10.0.0.6,proto=1,tos=0,ttl=64,frag=no),icmp(type=8,code=0), packets:1, bytes:98, used:1.160s, actions:3<br/> in_port(3),eth(src=0a:0d:4c:0c:50:9f,dst=da:4b:88:0c:1b:56),eth_type(0x0800),ipv4(src=10.0.0.6,dst=10.0.0.1,proto=1,tos=0,ttl=64,frag=no),icmp(type=0,code=0), packets:1, bytes:98, used:1.160s, actions:1</li> <li>s3 ------------------------------------------------------------------------<br/> in_port(1),eth(src=da:4b:88:0c:1b:56,dst=0a:0d:4c:0c:50:9f),eth_type(0x0800),ipv4(src=10.0.0.1,dst=10.0.0.6,proto=1,tos=0,ttl=64,frag=no),icmp(type=8,code=0), packets:1, bytes:98, used:1.160s, actions:3<br/> in_port(3),eth(src=0a:0d:4c:0c:50:9f,dst=da:4b:88:0c:1b:56),eth_type(0x0800),ipv4(src=10.0.0.6,dst=10.0.0.1,proto=1,tos=0,ttl=64,frag=no),icmp(type=0,code=0), packets:1, bytes:98, used:1.160s, actions:1</li> <li>s4 ------------------------------------------------------------------------</li> <li>s5 ------------------------------------------------------------------------<br/> in_port(1),eth(src=0a:0d:4c:0c:50:9f,dst=da:4b:88:0c:1b:56),eth_type(0x0800),ipv4(src=10.0.0.6,dst=10.0.0.1,proto=1,tos=0,ttl=64,frag=no),icmp(type=0,code=0), packets:1, bytes:98, used:1.160s, actions:3<br/> in_port(3),eth(src=da:4b:88:0c:1b:56,dst=0a:0d:4c:0c:50:9f),eth_type(0x0800),ipv4(src=10.0.0.1,dst=10.0.0.6,proto=1,tos=0,ttl=64,frag=no),icmp(type=8,code=0), packets:1, bytes:98, used:1.160s, actions:1</li> <li>s6 ------------------------------------------------------------------------<br/> in_port(3),eth(src=da:4b:88:0c:1b:56,dst=0a:0d:4c:0c:50:9f),eth_type(0x0800),ipv4(src=10.0.0.1,dst=10.0.0.6,proto=1,tos=0,ttl=64,frag=no),icmp(type=8,code=0), packets:1, bytes:98, used:1.164s, actions:2<br/> in_port(2),eth(src=0a:0d:4c:0c:50:9f,dst=da:4b:88:0c:1b:56),eth_type(0x0800),ipv4(src=10.0.0.6,dst=10.0.0.1,proto=1,tos=0,ttl=64,frag=no),icmp(type=0,code=0), packets:1, bytes:98, used:1.164s, actions:3</li> <li>s7 ------------------------------------------------------------------------<br/> mininet&gt; </li> </ul> </li> </ul> </li> </ul> <p>After a few seconds, I recheck the flows:</p> <p>mininet&gt; dpctl dump-flows</p> <ul> <li> <ul> <li> <ul> <li>s1 ------------------------------------------------------------------------</li> <li>s2 ------------------------------------------------------------------------</li> <li>s3 ------------------------------------------------------------------------</li> <li>s4 ------------------------------------------------------------------------</li> <li>s5 ------------------------------------------------------------------------</li> <li>s6 ------------------------------------------------------------------------</li> <li>s7 ------------------------------------------------------------------------<br/> mininet&gt; </li> </ul> </li> </ul> </li> </ul> <p>And they're gone, owing to ovs timeouts.</p> <p>I will mark this bug as invalid for the above reason. Please do note that the flows do get written on the switches by the controller before they time out, so the controller is doing its job.</p> <p>This bug is part of the project to Move all ADSAL associated component bugs to ADSAL</p> Development External issue ID 209 External issue URL Rank 0|i02i6n: